Low current comparator with programmable hysteresi

专利名称：Low current comparator with programmable

hysteresis

发明人：Joel Chatal申请号：US12409440申请日：20090323公开号：US08198920B2公开日：20120612

专利附图：

摘要：A low current comparator with programmable hysteresis is disclosed that usesa ratio of latch intrinsic (internal) latch capacitance and capacitance of a sample capacitorto adjust hysteresis. In some implementations, the comparator includes a switch capacitor

sampling stage coupled to a dynamic latch output stage. Depending on an output state (or ) of the comparator, hysteresis is generated by adding or subtracting a first chargestored in the latch intrinsic capacitance to or from a second charge stored in the samplingcapacitor. The ratio of latch intrinsic capacitance and the capacitance of the samplingcapacitor can be adjusted to trim hysteresis value. The hysteresis function does notrequire additional capacitors or additional logic.

申请人：Joel Chatal

地址：Carquefou FR

国籍：FR

代理机构：Fish & Richardson P.C.

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